50.8. Program to calculate the sum and average of positive numbers.

#include <stdio.h>
int main()
{
const int maxInput = 100;
int i;
double number, average, sum = 0.0;
for (i = 1; i <= maxInput; ++i)
{
printf("%d. Enter a number: ", i);
scanf("%lf", &number);
if (number < 0.0)
{
goto jump;
}
sum += number;
}
jump:
average = sum / (i - 1);
printf("Sum = %.2f\n", sum);
printf("Average = %.2f", average);
return 0;
}

Outpur:

1. Enter a number: 3
2. Enter a number: 4.3
3. Enter a number: 9.3
4. Enter a number: -2.9
Sum = 16.60
Average = 5.53